Search our collection of background (non-event) articles from news media, science journals and other sources.
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11 | 13 | 18 | 20 | 7 | 18 | 2 | 8 | 11 | 8 | 7 | 7 |
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SPRING | 20 | |
SUMMER | 18 | |
WINTER | 17 | |
FALL | 7 |
United States | 57 | |
Canada | 4 | |
Norway | 3 | |
French Polynesia | 1 | |
Russia | 1 | |
Svalbard and Jan Mayen | 1 |